Overview
The Ferraz Shawmut ST10-M-81-224 fuse holder is a single-pole, screw-terminal fuse block for industrial and commercial electrical systems. Rated 660V AC / 32A nominal, this holder accepts standard cylindrical fuses and provides secure, snap-fit fuse retention with straightforward terminal access. The lot of 2 ensures you maintain operational continuity with spare units on hand.
Key Features
- Single-pole configuration for branch circuit and equipment protection
- 660V AC rated voltage with 32A maximum current capacity
- Compact screw-terminal design compatible with 1.5–50 mm² (16–1 AWG) rigid wire
- Snap-fit fuse cartridge retention with secure clip mechanism
- Standard PZ 2 or flat 5.5 × 1 mm screwdriver-friendly terminal access
- IEC 60947.3 and CEI 947.3 certified for reliability and safety
Technical Specifications
- Rated Voltage: 660V AC (690V AC rated insulation)
- Rated Current: 32A (20A AC breaking capacity)
- Poles: 1
- Terminal Type: Screw (M5 stud)
- Wire Range: Rigid wire 1.5–50 mm² (16–1 AWG); Multistrand maximum 35 mm² (3 AWG)
- Tightening Torque: Max 4.5 Nm (45 lbf·in)
- Fuse Dimensions: 10 × 38 mm cartridge
- Weight: 70 g per unit
- Operating Frequency: 48–62 Hz
- Impulse Withstand (Uimp): 6 kV
Typical Applications
- Motor and transformer branch circuit protection
- Industrial control panels and switchboards
- Power distribution and sub-panel circuits
- Equipment protection in EU and international installations
- Replacement units in legacy electrical systems
Compatibility & Replacements
Compatible With
- Standard 10 × 38 mm fuse cartridges (FS fuses rated to 690V / 32A and below)
- Ferraz Shawmut power fuses (series DT, gG type)
- IEC 60127-2 compliant fuses in 32A and lower ratings
- Terminal blocks and DIN rail mounting systems via appropriate adapters
- Industrial distribution panels with screw-terminal feedthroughs
Replaces / Drop-In Replacement For
- Original Ferraz Shawmut ST10 (G081219) variants
- M-81-224 fuse block assemblies (direct match)
- Verify specific model compatibility with your system integrator before ordering to ensure terminal and mounting alignment
Works With
- IEC 60947.3 certified control circuits and branch protection schemes
- NFPA and international electrical codes requiring DIN/IEC fuse holders
- Ferraz Shawmut diagnostic and fuse-blown indicator add-ons (optional microswitch modules)
- Standard industrial PLC safety and circuit protection topologies
